Initial commit: Minecraft 光追着色器包（从零实现的 path tracing）

shaders/Lib/Programs/Composite/DiffuseSpatial_FS.glsl

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+// MinecraftPT — DiffuseSpatial (single pass, step parameterized by composite index)
+#include "/Lib/Settings.glsl"
+#include "/Lib/Utilities.glsl"
+#include "/Lib/PathTracing/Denoiser/DiffuseSpatialFilter.glsl"
+
+layout(location = 0) out vec4 colorOut;
+
+void main(){
+	vec2 texelCoord = gl_FragCoord.xy;
+	vec3 color = texelFetch(colortex7, ivec2(texelCoord), 0).rgb;
+
+	// Step size determined by whic composite pass we are
+	int step = 1;
+	#ifdef SPATIAL_STEP_2
+		step = 2;
+	#elif defined SPATIAL_STEP_4
+		step = 4;
+	#elif defined SPATIAL_STEP_8
+		step = 8;
+	#endif
+
+	color = DiffuseSpatialPass(color, texelCoord, step);
+
+	colorOut = vec4(color, 1.0);
+}